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Magnesium Ascorbyl Phosphate (Vitamin C)
AKA “Magnesium Ascorbyl Phosphate (MAP), Vitamin C derivative”
Vitamin C
Ingredient Facts
Magnesium ascorbyl phosphate (Vitamin C)
AKA: Magnesium Ascorbyl Phosphate (MAP), Vitamin C derivative
Vitamin C · Antioxidant · EWG: 4
Varies With Manufacturer
Antioxidant
Skin Conditioner
Vitamin C
Clean
A stabilized form of Vitamin C that helps protect skin from environmental damage and keeps it smooth and conditioned.
CAS #
114040-31-2 --- 113170-55-1
See origin →
Functions
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Anti-Inflammatory
Fights Acne
Fights free radical damage
Traditional Use
Vitamin C was isolated in 1932. Magnesium ascorbyl phosphate is a stable derivative developed in the 1990s as a more shelf-stable alternative to pure L-ascorbic acid for anti-aging and brightening skincare.
Skin Types
●all-skin-types
Best For
Dullness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
all-shades-safe
Phototoxicity Concern
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Vitamin C (Ascorbic Acid).
Abdullah M, Jamil RT, Attia FN
, 2026
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Vitamin C (Ascorbic Acid).
Abdullah M, Jamil RT, Attia FN
, 2026
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Topical Vitamin C and the Skin: Mechanisms of Action and ...
Firas Al-Niaimi, Nicole Yi Zhen Chiang
The Journal of clinical and aesthetic dermatology, 2017
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Topical Vitamin C in Dermatology
Al-Niaimi F, Chiang NYZ
Journal of Clinical and Aesthetic Dermatology, 2017
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Topical Vitamin C and the Skin: Mechanisms of Action and Clinical Applications.
Al-Niaimi F, Chiang NYZ
The Journal of clinical and aesthetic dermatology, 2017
→
Ascorbic Acid (Vitamin C) as a Cosmeceutical to Increase ...
Yong Chool Boo
Antioxidants (Basel, Switzerland), 2022
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Ascorbic Acid (Vitamin C) as a Cosmeceutical to Increase ...
Yong Chool Boo
Antioxidants (Basel, Switzerland), 2022
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Ascorbic Acid (Vitamin C) as a Cosmeceutical to Increase Dermal Collagen for Skin Antiaging Purposes: Emerging Combination Therapies.
Boo YC
Antioxidants (Basel, Switzerland), 2022
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The role of Bromelain and Liposomal Vitamin C in the trea...
Giacomo Buso, Paolo Santini, Francesca Ghirardini, Francesca Cannavacciuolo, Adriana Visonà, Beniamino Zalunardo + 2 more
VASA. Zeitschrift fur Gefasskrankheiten, 2025
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Final Report on the Safety Assessment of L-Ascorbic Acid, Calcium Ascorbate, Magnesium Ascorbate, Magnesium Ascorbyl Phosphate, Sodium Ascorbate, and Sodium Ascorbyl Phosphate as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
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Ascorbic Acid (Vitamin C)
European Commission
EU Cosmetic Ingredient Database (CosIng)
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Magnesium Ascorbyl Phosphate [Vitamin C]
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Final report of the safety assessment of L-Ascorbic Acid, Calcium Ascorbate, Magnesium Ascorbate, Magnesium Ascorbyl Phosphate, Sodium Ascorbate, and
Elmore AR
International journal of toxicology, 2005
→
Final report of the safety assessment of L-Ascorbic Acid, Calcium Ascorbate, Magnesium Ascorbate, Magnesium Ascorbyl Phosphate, Sodium Ascorbate, and
Elmore AR
International journal of toxicology, 2005
→
Final report of the safety assessment of L-Ascorbic Acid, Calcium Ascorbate, Magnesium Ascorbate, Magnesium Ascorbyl Phosphate, Sodium Ascorbate, and
Elmore AR
International journal of toxicology, 2005
→
Final report of the safety assessment of L-Ascorbic Acid, Calcium Ascorbate, Magnesium Ascorbate, Magnesium Ascorbyl Phosphate, Sodium Ascorbate, and
Elmore AR
International journal of toxicology, 2005
→
Ascorbic Acid (Vitamin C)
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
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Magnesium Ascorbyl Phosphate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
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[Vitamin C and its derivatives in maintaining the good skin condition].
Goik U
Postepy biochemii, 2024
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Vitamin C-squalene bioconjugate promotes epidermal thicke...
R Gref, C Deloménie, A Maksimenko, E Gouadon, G Percoco, E Lati + 3 more
Scientific reports, 2020
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Vanillic acid and vitamin C attenuated di-2-ethylhexyl ph...
B Ogunlade, S C Gbotolorun, O A Adedotun, K Iteire, J Adejayi
Reproduction & fertility, 2022
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Roles of Vitamin C in Skin Health
Pullar JM, Carr AC, Vissers MCM
Nutrients, 2017
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Verified Feb 2026
Data: CosIng · EWG · CIR